221011223 has 8 divisors (see below), whose sum is σ = 224296368. Its totient is φ = 217733184.

The previous prime is 221011201. The next prime is 221011243. The reversal of 221011223 is 322110122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221011223 - 2¹⁸ = 220749079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221011198 and 221011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125636 + ... + 127382.

It is an arithmetic number, because the mean of its divisors is an integer number (28037046).

Almost surely, 2^221011223 is an apocalyptic number.

221011223 is a deficient number, since it is larger than the sum of its proper divisors (3285145).

221011223 is a wasteful number, since it uses less digits than its factorization.

221011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221011223 is about 14866.4462128647. The cubic root of 221011223 is about 604.6045937606.

Adding to 221011223 its reverse (322110122), we get a palindrome (543121345).

The spelling of 221011223 in words is "two hundred twenty-one million, eleven thousand, two hundred twenty-three".